Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes

Atucha II Nuclear Power Plant (CNA II) is a pressurized heavy water reactor (PHWR) that started its commercial operation in May 2016. Construction began during 1980, and the design licensing base, agreed between the Responsible Entity (CNEA at that time) and the designer (KWU/Siemens), did not consi...

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Autores principales: Pecorari, Agustín, Risso, José, Cardona, Alberto, Politi, Adriana
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2017
Materias:
Ingeniería
Dynamic Analyses
FEM
DEGB
BDBE
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/105203
https://cimec.org.ar/ojs/index.php/mc/article/view/5397
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-105203
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
Dynamic Analyses
FEM
DEGB
BDBE
spellingShingle Ingeniería
Dynamic Analyses
FEM
DEGB
BDBE
Pecorari, Agustín
Risso, José
Cardona, Alberto
Politi, Adriana
Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
topic_facet Ingeniería
Dynamic Analyses
FEM
DEGB
BDBE
description Atucha II Nuclear Power Plant (CNA II) is a pressurized heavy water reactor (PHWR) that started its commercial operation in May 2016. Construction began during 1980, and the design licensing base, agreed between the Responsible Entity (CNEA at that time) and the designer (KWU/Siemens), did not consider the double-ended guillotine break (DEGB) event in the primary pipe loop as a requirement of the emergency core cooling systems and reactor shutdown. Instead, a 10% loss of coolant of the cross section of the primary system, which would be equivalent to a surgeline DEGB (line connecting the primary system with the pressurizer), was considered. The Autoridad Regulatoria Nuclear (nuclear regulatory body of Argentina – ARN) entrusted the realization of an independent evaluation, to assess whether a DEGB caused by a beyond design basis event could be possible. A dynamic analysis of the Loop 2 of CNA II’s primary system was performed employing the finite element method (FEM) for a beyond design basis earthquake scene, i.e. an earthquake with a mean probability of exceedance of 10-6 per year, to evaluate the possibility of occurrence of a DEGB with critical preexisting areas with circumferential through-wall cracks in the primary system. The model utilized displacement time histories as input data, applied at the supporting points of major components (reactor pressure vessel, stream generator, main coolant pump, pressurizer), obtained by numerical integration of the acceleration time histories at such points, provided by the designer.
format Objeto de conferencia
Objeto de conferencia
author Pecorari, Agustín
Risso, José
Cardona, Alberto
Politi, Adriana
author_facet Pecorari, Agustín
Risso, José
Cardona, Alberto
Politi, Adriana
author_sort Pecorari, Agustín
title Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
title_short Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
title_full Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
title_fullStr Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
title_full_unstemmed Dynamic Finite Element Analyses of the Primary System of the Atucha II NPP under Beyond Design Basis Earthquakes
title_sort dynamic finite element analyses of the primary system of the atucha ii npp under beyond design basis earthquakes
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/105203
https://cimec.org.ar/ojs/index.php/mc/article/view/5397
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